EP2442329A1 - Noise decreasing type electromagnetic switch - Google Patents
Noise decreasing type electromagnetic switch Download PDFInfo
- Publication number
- EP2442329A1 EP2442329A1 EP11185041A EP11185041A EP2442329A1 EP 2442329 A1 EP2442329 A1 EP 2442329A1 EP 11185041 A EP11185041 A EP 11185041A EP 11185041 A EP11185041 A EP 11185041A EP 2442329 A1 EP2442329 A1 EP 2442329A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- movable
- stationary
- stationary core
- buffer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003247 decreasing effect Effects 0.000 title claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 13
- 230000003139 buffering effect Effects 0.000 claims abstract description 7
- 230000007774 longterm Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/02—Non-polarised relays
- H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
- H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
- H01H51/065—Relays having a pair of normally open contacts rigidly fixed to a magnetic core movable along the axis of a solenoid, e.g. relays for starting automobiles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
- H01H50/023—Details concerning sealing, e.g. sealing casing with resin
- H01H2050/025—Details concerning sealing, e.g. sealing casing with resin containing inert or dielectric gasses, e.g. SF6, for arc prevention or arc extinction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
- H01H50/163—Details concerning air-gaps, e.g. anti-remanence, damping, anti-corrosion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
- H01H50/18—Movable parts of magnetic circuits, e.g. armature
- H01H50/20—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil
- H01H50/22—Movable parts of magnetic circuits, e.g. armature movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil wherein the magnetic circuit is substantially closed
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
Definitions
- This specification relates to a noise decreasing type electromagnetic switch capable of noise generated between a stationary core and a movable core.
- an electromagnetic switch is located between a battery and a direct current (DC) power converter of an electric vehicle, such as a hybrid car, a fuel cell car, an electric golf cart, an electric folklift truck and the like, and serves to supply power of the battery to the power converter, and supply power generated from a power generator to the battery.
- DC direct current
- the electromagnetic switch includes a coil which is excited (magnetized) or demagnetized according to whether or not a control current flows, a yoke installed around the coil to define (form) a magnetic path in the vicinity of the coil, a metal plate installed to face the yoke and defining the magnetic path around the coil together with the yoke, a stationary core fixed to the metal plate, a movable core installed to face the stationary core, and movably installed to contact the stationary core when the coil is excited and to be separated from the stationary core when the coil is demagnetized, a shaft having one end portion coupled to the movable core and movable together with the movable core, and a return spring located between the stationary core and the movable core and having a larger elastic force than contact pressure of a contact spring such that the movable core is separated from the stationary core.
- an aspect of the detailed description is to provide a noise decreasing type electromagnetic switch capable of simplifying a coupling process as well as maintaining long-term durability.
- a noise decreasing type electromagnetic switch may include a coil, a yoke installed adjacent to the coil, a metal plate forming a magnetic path adjacent to the coil together with the yoke, a stationary core fixedly installed at the metal plate, a movable core contactable with the stationary core when the coil is excited, a return spring disposed between the movable core and the stationary core to apply an elastic force such that the movable core is separated from the stationary core, a shaft connected to the movable core to be movable together with the movable core, a movable contact point coupled to the shaft to be movable together with the shaft, a stationary contact point fixed to face the movable contact point and contactable with or separated from the movable contact point such that an electric circuit is closed or open, and a contact spring configured to elastically support the movable contact point to contact the stationary contact point, wherein a buffer is disposed between the stationary core
- FIG. 1 is a sectional view showing an open state of a noise decreasing type electromagnetic switch in accordance with one exemplary embodiment
- FIG. 2 is a sectional view showing a closed state of the noise decreasing type switch
- FIG. 3 is a side view showing a stationary core in accordance with the one exemplary embodiment
- FIG. 4 is a perspective view showing a buffer in accordance with the one exemplary embodiment.
- a noise decreasing type electromagnetic switch 10 may include a driving unit 100, and a conducting unit 200 switched on or off with respect to the exterior with moving up and down by the driving unit 100.
- the conducting unit 200 may have a contact-point switching structure, which includes a stationary contact point 220 and a movable contact point 210, so as to allow switching with respect to an external device connected to the electromagnetic switch 10.
- the driving unit 100 may control contact or non-contact between the contact points using an electric signal.
- the driving unit may include a coil 110 for generating driving forces of the contact points by a magnetic force generated by the electric signal, a yoke 120 installed adjacent to the coil 110 to form a magnetic path adjacent to the coil 110, a metal plate 130 forming a magnetic path adjacent to the coil 110 together with the yoke 120, a stationary core 140 fixed within the coil 110, and a movable core 150 disposed to face the stationary core 140.
- a coil bobbin 180, on which the coil 110 is wound, may be located between the coil 110 and the stationary core 140 and the movable core 150.
- the stationary core 140 and the movable core 150 may be disposed in a longitudinal direction based on an axial direction of the coil bobbin 180.
- the stationary core 140 and the movable core 150 may form a magnetic path, through which magnetic flux generated by the coil 110 flows. The magnetic flux generated by the coil 110 may make the movable core 150 moved up and down.
- a core case 190 may be located between the coil bobbin 180 and the stationary and movable cores 140 and 150.
- the core case 190 may be formed of a non-magnetic material and be in a cylindrical shape having an opening at a surface facing the conducting unit 200 and a bottom of an opposite surface blocked. That is, the core case 190 may have a shape like a case for accommodation of the stationary core 140 and the movable core 150 therein, and be formed in a cylindrical shape with an inner diameter, which is approximately the same as the outer diameter of each of the stationary core 140 and the movable core 150.
- the movable core 150 may be movable in an axial direction of the core case 190.
- the movable core 150 may be movable in the range between a position of being contactable with the stationary core 140 and an initial position where the movable core 150 is separated from the bottom of the opposite surface of the core case 190.
- the movable core 150 may be contactable with the stationary core 140 by a contact spring 230 to be explained later and return to its original position by a return spring 160 to be explained later.
- a through hole may be formed through central portions of the stationary core 140 and the movable core 150 in an axial direction.
- a shaft 170 may be inserted through the through hole so as to connect the driving unit 100 and the conducting unit 200 to each other.
- the shaft 170 may be coupled with the movable contact point 210 at its upper end and the movable core 150 at its lower end so as to transfer a longitudinal motion of the movable core 150 to the movable contact point 210.
- a cover 240 may be coupled to the driving unit 100 by being loaded on the driving unit 100.
- the cover 240 may be box-shaped with an open lower side. Terminal holes (reference numeral not given) for insertion of the stationary contact point 220 and a fixing terminal therein may be formed at an upper portion of the cover 240.
- the movable contact point 210 coupled to the shaft 170 below the stationary contact point 220 may be disposed within the cover 240.
- a space for performing contact and separation between the stationary contact point 220 and the movable contact point 210 for a switching operation may be present between the stationary contact point 220 and the movable contact point 210 within the cover 240.
- the contact spring 230 may be disposed at a lower side of the movable contact point 210.
- the contact spring 230 may have an elastic force when the movable contact point 210 contacts the stationary contact point 220.
- the contact spring 230 may allow the movable contact point 210 to remain in the contact state with the stationary contact point 220 by pressure more than a preset level.
- the contact spring 230 may reduce a movement speed of each movable core 150 and shaft 170. Consequently, when the movable core 150 contacts the core case 190, an impact may be relieved to minimize or prevent generation of noise and vibration.
- the movable contact point 210 which is movable in response to movement of the shaft 170, may be coupled to another end of the shaft 170, and the stationary contact point 220 may be fixed above the movable contact point 210 to face the movable contact point 210. As the stationary contact point 220 contacts or is separated from the movable contact point 210, an electric circuit is closed or open.
- the contact spring 230 for providing an elastic force to the movable contact point 210 to contact the stationary contact point 220 may be installed at the lower side of the movable contact point 210 at the periphery of the shaft 170.
- the movable core 150 when a magnetic field is formed in response to power being applied to the coil 110, the movable core 150 is attracted toward the stationary core 140, the upper conducting unit 200 is run by the shaft 170 connected to the movable core 150.
- the movable core 150 contacts the stationary core 140, thereby generating impact noise, which may lower a perceived quality of a product.
- a buffer which is in an annular shape having sawlike threads attached thereon, may be mounted between the stationary core and the shaft to decrease vibration and noise generated between the shaft and the stationary core.
- the sawlike buffer may probably experience an impact fatigue cumulative damage in view of its structural characteristic.
- the buffer is simply mounted at the stationary core, upon repetitive operations, it may be separated from its initial position and sandwiched between other structures.
- this exemplary embodiment aims to implementing a structure that a bowl-shaped buffer is coupled to a recess of the stationary core, has a buffering space therein, and supports the stationary core and the metal plate.
- a fixing recess 141 which is recessed (concaved) inwardly, may be formed at an upper portion of the stationary core 140 along a periphery thereof.
- a fixing step 330 of a buffer 300 to be explained later may be inserted in the fixing recess 141.
- the fixing recess 141 may preferably be formed such that the fixing step 330 to be explained later can be inserted therein so as to support the metal plate 130.
- the buffer 300 may include a side wall portion portion 310 defining a cylindrical shape, an supporting portion 320 curved inwardly to support an upper end of the side wall portion portion 310, namely, the contact spring 230, and a fixing step 330 curved inwardly from a lower end of the side wall portion portion 310.
- the side wall portion portion 310 may be formed in form of a smooth pipe. Alternatively, the side wall portion portion 310 may be formed in form of a bellows.
- the side wall portion portion 310 may be higher than a distance or gap between the fixing recess 141 and an upper surface of the stationary core 140 so as to define a specific buffering space 340 between an inner side surface of the side wall portion portion 310 and the stationary core 140.
- the fixing step 330 of the buffer 300 may be inserted in the fixing recess 141 of the stationary core 140 to prevent the separation of the buffer 300 upon driving the shaft 170.
- the buffering space is formed within the buffer so as to absorb impact due to air staying in the buffering space, in addition to an elastic force of the buffer.
- the buffer may be coupled to the recess of the stationary core to be prevented from being separated, thereby maintaining long-term durability.
- the buffer may support the stationary core and the metal plate, thereby simplifying an assembly process.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Push-Button Switches (AREA)
- Electromagnets (AREA)
- Vibration Dampers (AREA)
Abstract
Description
- This specification relates to a noise decreasing type electromagnetic switch capable of noise generated between a stationary core and a movable core.
- In general, an electromagnetic switch is located between a battery and a direct current (DC) power converter of an electric vehicle, such as a hybrid car, a fuel cell car, an electric golf cart, an electric folklift truck and the like, and serves to supply power of the battery to the power converter, and supply power generated from a power generator to the battery.
- The electromagnetic switch includes a coil which is excited (magnetized) or demagnetized according to whether or not a control current flows, a yoke installed around the coil to define (form) a magnetic path in the vicinity of the coil, a metal plate installed to face the yoke and defining the magnetic path around the coil together with the yoke, a stationary core fixed to the metal plate, a movable core installed to face the stationary core, and movably installed to contact the stationary core when the coil is excited and to be separated from the stationary core when the coil is demagnetized, a shaft having one end portion coupled to the movable core and movable together with the movable core, and a return spring located between the stationary core and the movable core and having a larger elastic force than contact pressure of a contact spring such that the movable core is separated from the stationary core.
- In the structure of the related art electromagnetic switch, when a magnetic field is formed in response to power being applied to the coil, the movable core is attracted toward the stationary core, and an upper conductive portion is run by the shaft connected to the movable core. However, impact noise may be generated while the shaft movable in cooperation with the movable core contacts the stationary core, thereby causing degradation of a perceived quality of a product.
- Therefore, an aspect of the detailed description is to provide a noise decreasing type electromagnetic switch capable of simplifying a coupling process as well as maintaining long-term durability.
- To achieve these and other advantages and in accordance with the purpose of this specification, as embodied and broadly described herein, a noise decreasing type electromagnetic switch may include a coil, a yoke installed adjacent to the coil, a metal plate forming a magnetic path adjacent to the coil together with the yoke, a stationary core fixedly installed at the metal plate, a movable core contactable with the stationary core when the coil is excited, a return spring disposed between the movable core and the stationary core to apply an elastic force such that the movable core is separated from the stationary core, a shaft connected to the movable core to be movable together with the movable core, a movable contact point coupled to the shaft to be movable together with the shaft, a stationary contact point fixed to face the movable contact point and contactable with or separated from the movable contact point such that an electric circuit is closed or open, and a contact spring configured to elastically support the movable contact point to contact the stationary contact point, wherein a buffer is disposed between the stationary core and the contact spring to elastically support the shaft and the stationary core.
- Further scope of applicability of the present application will become more apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from the detailed description.
- The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments and together with the description serve to explain the principles of the invention.
- In the drawings:
-
FIG. 1 is a sectional view showing an open state of a noise decreasing type electromagnetic switch in accordance with one exemplary embodiment; -
FIG. 2 is a sectional view showing a closed state of the noise decreasing type switch; -
FIG. 3 is a side view showing a stationary core in accordance with the one exemplary embodiment; -
FIG. 4 is a perspective view showing a buffer in accordance with the one exemplary embodiment; and -
FIG. 5 is a perspective view showing a buffer in accordance with another exemplary embodiment. - Description will now be given in detail of the exemplary embodiments, with reference to the accompanying drawings. For the sake of brief description with reference to the drawings, the same or equivalent components will be provided with the same reference numbers, and description thereof will not be repeated.
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FIG. 1 is a sectional view showing an open state of a noise decreasing type electromagnetic switch in accordance with one exemplary embodiment,FIG. 2 is a sectional view showing a closed state of the noise decreasing type switch,FIG. 3 is a side view showing a stationary core in accordance with the one exemplary embodiment, andFIG. 4 is a perspective view showing a buffer in accordance with the one exemplary embodiment. - As shown in
FIGS. 1 and2 , a noise decreasing typeelectromagnetic switch 10 may include adriving unit 100, and a conductingunit 200 switched on or off with respect to the exterior with moving up and down by thedriving unit 100. The conductingunit 200 may have a contact-point switching structure, which includes astationary contact point 220 and amovable contact point 210, so as to allow switching with respect to an external device connected to theelectromagnetic switch 10. - The
driving unit 100 may control contact or non-contact between the contact points using an electric signal. The driving unit may include acoil 110 for generating driving forces of the contact points by a magnetic force generated by the electric signal, ayoke 120 installed adjacent to thecoil 110 to form a magnetic path adjacent to thecoil 110, ametal plate 130 forming a magnetic path adjacent to thecoil 110 together with theyoke 120, astationary core 140 fixed within thecoil 110, and amovable core 150 disposed to face thestationary core 140. - A
coil bobbin 180, on which thecoil 110 is wound, may be located between thecoil 110 and thestationary core 140 and themovable core 150. Thestationary core 140 and themovable core 150 may be disposed in a longitudinal direction based on an axial direction of thecoil bobbin 180. Thestationary core 140 and themovable core 150 may form a magnetic path, through which magnetic flux generated by thecoil 110 flows. The magnetic flux generated by thecoil 110 may make themovable core 150 moved up and down. - A
core case 190 may be located between thecoil bobbin 180 and the stationary andmovable cores core case 190 may be formed of a non-magnetic material and be in a cylindrical shape having an opening at a surface facing the conductingunit 200 and a bottom of an opposite surface blocked. That is, thecore case 190 may have a shape like a case for accommodation of thestationary core 140 and themovable core 150 therein, and be formed in a cylindrical shape with an inner diameter, which is approximately the same as the outer diameter of each of thestationary core 140 and themovable core 150. Themovable core 150 may be movable in an axial direction of thecore case 190. - The
movable core 150 may be movable in the range between a position of being contactable with thestationary core 140 and an initial position where themovable core 150 is separated from the bottom of the opposite surface of thecore case 190. Themovable core 150 may be contactable with thestationary core 140 by acontact spring 230 to be explained later and return to its original position by areturn spring 160 to be explained later. - A through hole may be formed through central portions of the
stationary core 140 and themovable core 150 in an axial direction. Ashaft 170 may be inserted through the through hole so as to connect thedriving unit 100 and the conductingunit 200 to each other. Theshaft 170 may be coupled with themovable contact point 210 at its upper end and themovable core 150 at its lower end so as to transfer a longitudinal motion of themovable core 150 to themovable contact point 210. - A
cover 240 may be coupled to thedriving unit 100 by being loaded on thedriving unit 100. Thecover 240 may be box-shaped with an open lower side. Terminal holes (reference numeral not given) for insertion of thestationary contact point 220 and a fixing terminal therein may be formed at an upper portion of thecover 240. - The
movable contact point 210 coupled to theshaft 170 below thestationary contact point 220 may be disposed within thecover 240. A space for performing contact and separation between thestationary contact point 220 and themovable contact point 210 for a switching operation may be present between thestationary contact point 220 and themovable contact point 210 within thecover 240. - The
contact spring 230 may be disposed at a lower side of themovable contact point 210. Thecontact spring 230 may have an elastic force when themovable contact point 210 contacts thestationary contact point 220. Thecontact spring 230 may allow themovable contact point 210 to remain in the contact state with thestationary contact point 220 by pressure more than a preset level. Also, when themovable contact point 210 is separated from thestationary contact point 220, thecontact spring 230 may reduce a movement speed of eachmovable core 150 andshaft 170. Consequently, when themovable core 150 contacts thecore case 190, an impact may be relieved to minimize or prevent generation of noise and vibration. - The
movable contact point 210, which is movable in response to movement of theshaft 170, may be coupled to another end of theshaft 170, and thestationary contact point 220 may be fixed above themovable contact point 210 to face themovable contact point 210. As thestationary contact point 220 contacts or is separated from themovable contact point 210, an electric circuit is closed or open. - The
contact spring 230 for providing an elastic force to themovable contact point 210 to contact thestationary contact point 220 may be installed at the lower side of themovable contact point 210 at the periphery of theshaft 170. - With the configuration of the
electromagnetic switch 10, when a magnetic field is formed in response to power being applied to thecoil 110, themovable core 150 is attracted toward thestationary core 140, the upper conductingunit 200 is run by theshaft 170 connected to themovable core 150. Here, themovable core 150 contacts thestationary core 140, thereby generating impact noise, which may lower a perceived quality of a product. - To address such problem, a buffer, which is in an annular shape having sawlike threads attached thereon, may be mounted between the stationary core and the shaft to decrease vibration and noise generated between the shaft and the stationary core. However, the sawlike buffer may probably experience an impact fatigue cumulative damage in view of its structural characteristic. Furthermore, as the buffer is simply mounted at the stationary core, upon repetitive operations, it may be separated from its initial position and sandwiched between other structures.
- Therefore, this exemplary embodiment aims to implementing a structure that a bowl-shaped buffer is coupled to a recess of the stationary core, has a buffering space therein, and supports the stationary core and the metal plate.
- To this end, a
fixing recess 141, which is recessed (concaved) inwardly, may be formed at an upper portion of thestationary core 140 along a periphery thereof. Afixing step 330 of abuffer 300 to be explained later may be inserted in thefixing recess 141. - The
fixing recess 141 may preferably be formed such that thefixing step 330 to be explained later can be inserted therein so as to support themetal plate 130. - The
buffer 300 may include a sidewall portion portion 310 defining a cylindrical shape, an supportingportion 320 curved inwardly to support an upper end of the sidewall portion portion 310, namely, thecontact spring 230, and a fixingstep 330 curved inwardly from a lower end of the sidewall portion portion 310. - The side
wall portion portion 310 may be formed in form of a smooth pipe. Alternatively, the sidewall portion portion 310 may be formed in form of a bellows. - The side
wall portion portion 310 may be higher than a distance or gap between the fixingrecess 141 and an upper surface of thestationary core 140 so as to define aspecific buffering space 340 between an inner side surface of the sidewall portion portion 310 and thestationary core 140. - When the inwardly recessed
stationary recess 141 is formed at the upper side surface of thestationary core 140, the fixingstep 330 of thebuffer 300 may be inserted in the fixingrecess 141 of thestationary core 140 to prevent the separation of thebuffer 300 upon driving theshaft 170. - In accordance with the noise decreasing type electromagnetic switch, the buffering space is formed within the buffer so as to absorb impact due to air staying in the buffering space, in addition to an elastic force of the buffer. Also, the buffer may be coupled to the recess of the stationary core to be prevented from being separated, thereby maintaining long-term durability. The buffer may support the stationary core and the metal plate, thereby simplifying an assembly process.
- The foregoing embodiments and advantages are merely exemplary and are not to be construed as limiting the present disclosure. The present teachings can be readily applied to other types of apparatuses. This description is intended to be illustrative, and not to limit the scope of the claims. Many alternatives, modifications, and variations will be apparent to those skilled in the art. The features, structures, methods, and other characteristics of the exemplary embodiments described herein may be combined in various ways to obtain additional and/or alternative exemplary embodiments.
- As the present features may be embodied in several forms without departing from the characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalents of such metes and bounds are therefore intended to be embraced by the appended claims.
Claims (9)
- A noise decreasing type electromagnetic switch comprising:a coil (110);a yoke (120) installed adjacent to the coil (110);a metal plate (130) forming a magnetic path adjacent to the coil (110) together with the yoke (120);a stationary core (140) fixedly installed at the metal plate (130);a movable core (150) contactable with the stationary core (140) when the coil (110) is excited;a return spring (160) disposed between the movable core (150) and the stationary core (140) to apply an elastic force such that the movable core (150) is separated from the stationary core (140);a shaft (170) connected to the movable core (150) to be movable together with the movable core (150);a movable contact point (210) coupled to the shaft (170) to be movable together with the shaft (170);a stationary contact point (220) fixed to face the movable contact point (210) and contactable with or separated from the movable contact point (210) such that an electric circuit is closed or open; anda contact spring (230) configured to elastically support the movable contact point (210) to contact the stationary contact point (220),characterized in that a buffer (300) is disposed between the stationary core (140) and the contact spring (230) to elastically support the shaft (170) and the stationary core (140).
- The switch of claim 1, wherein a fixing recess (141 is formed at an outer circumferential surface of the stationary core (140),
wherein a fixing step (330) is formed at one end of the buffer (300) to be inserted in the fixing recess (141). - The switch of claim 2, wherein the buffer (300) comprises:a side wall portion (310) formed in a cylindrical shape and having the fixing step (330) formed at one end thereof; andan supporting portion (320) curved inwardly from another end of the side wall portion (310) to support the contact spring (230).
- The switch of claim 3, wherein the supporting portion (320) is formed such that an inner side surface thereof is higher than an upper surface of the stationary core (140).
- The switch of claim 3, wherein the side wall portion (310) is formed in form of a smooth pipe.
- The switch of claim 3, wherein the side wall portion (310) is formed in form of a bellows.
- The switch of claim 2, wherein the fixing recess (141) is formed to be flush with an upper surface of the metal plate (130) or adjacent to the contact spring (230) rather than the metal plate (230).
- The switch of claim 7, wherein the fixing step (330) is longer than a depth of the fixing recess (141.
- The switch of any of claims 1 to 8, wherein the buffer (300) comprises a buffering space between the stationary core (140) and the shaft (170).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020100100793A KR101072630B1 (en) | 2010-10-15 | 2010-10-15 | Noise decreasing type electronic switch |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2442329A1 true EP2442329A1 (en) | 2012-04-18 |
EP2442329B1 EP2442329B1 (en) | 2014-07-09 |
Family
ID=44799808
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11185041.8A Active EP2442329B1 (en) | 2010-10-15 | 2011-10-13 | Noise decreasing type electromagnetic switch |
Country Status (6)
Country | Link |
---|---|
US (1) | US8330565B2 (en) |
EP (1) | EP2442329B1 (en) |
JP (1) | JP5296854B2 (en) |
KR (1) | KR101072630B1 (en) |
CN (1) | CN102543586B (en) |
ES (1) | ES2505247T3 (en) |
Families Citing this family (10)
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JP5981756B2 (en) * | 2012-04-13 | 2016-08-31 | 富士電機機器制御株式会社 | Magnetic contactor |
CN104285269B (en) * | 2012-05-17 | 2016-11-09 | 三菱电机株式会社 | Electromagnetism shutter |
KR200470820Y1 (en) | 2012-08-27 | 2014-01-13 | 엘에스산전 주식회사 | Noise and vibration absorbing mechanism for magnetic contactor |
CN104838463B (en) | 2012-12-10 | 2017-10-31 | 特斯拉汽车公司 | Electromagnetic switch with stable movable contact |
JP6064223B2 (en) * | 2012-12-28 | 2017-01-25 | パナソニックIpマネジメント株式会社 | Contact device and electromagnetic relay equipped with the contact device |
CN105359243B (en) | 2013-06-28 | 2018-06-05 | 松下知识产权经营株式会社 | Contact making device and the electromagnetic relay for being equipped with the contact making device |
JP6590273B2 (en) * | 2015-04-13 | 2019-10-16 | パナソニックIpマネジメント株式会社 | Contact device and electromagnetic relay |
KR101943365B1 (en) * | 2015-10-14 | 2019-01-29 | 엘에스산전 주식회사 | Direct Relay |
KR101943366B1 (en) | 2015-12-30 | 2019-01-29 | 엘에스산전 주식회사 | Direct Relay |
CN106024527B (en) * | 2016-06-20 | 2018-09-18 | 厦门宏发电力电器有限公司 | A kind of noise-damping bowl and its noise reducing type relay |
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EP1953784A1 (en) * | 2005-11-25 | 2008-08-06 | Matsushita Electric Works, Ltd. | Electromagnetic switching device |
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JPS62165394A (en) * | 1986-01-16 | 1987-07-21 | 富士通株式会社 | Supporting terminal of electronic parts |
JP2006310247A (en) | 2005-03-28 | 2006-11-09 | Matsushita Electric Works Ltd | Electromagnet switching device |
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JP4404067B2 (en) * | 2006-04-18 | 2010-01-27 | パナソニック電工株式会社 | Electromagnetic switchgear |
JP4508091B2 (en) * | 2005-11-25 | 2010-07-21 | パナソニック電工株式会社 | Electromagnetic switchgear |
JP2007287526A (en) * | 2006-04-18 | 2007-11-01 | Matsushita Electric Works Ltd | Contact device |
JP2007294264A (en) * | 2006-04-25 | 2007-11-08 | Matsushita Electric Works Ltd | Contact device |
JP4702380B2 (en) * | 2008-03-19 | 2011-06-15 | パナソニック電工株式会社 | Contact device |
JP5163317B2 (en) * | 2008-06-30 | 2013-03-13 | オムロン株式会社 | Contact device |
JP5140030B2 (en) * | 2009-04-24 | 2013-02-06 | パナソニック株式会社 | Contact device |
KR20110079233A (en) * | 2009-12-31 | 2011-07-07 | 엘에스산전 주식회사 | Sealed cased magnetic switch |
KR101681591B1 (en) * | 2010-01-25 | 2016-12-01 | 엘에스산전 주식회사 | Electromagnetic switch |
KR101072629B1 (en) * | 2010-10-15 | 2011-10-12 | 엘에스산전 주식회사 | Noise decreasing type electronic switch |
-
2010
- 2010-10-15 KR KR1020100100793A patent/KR101072630B1/en active IP Right Grant
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2011
- 2011-10-07 JP JP2011223085A patent/JP5296854B2/en active Active
- 2011-10-12 US US13/272,155 patent/US8330565B2/en active Active
- 2011-10-13 CN CN201110310347.2A patent/CN102543586B/en active Active
- 2011-10-13 ES ES11185041.8T patent/ES2505247T3/en active Active
- 2011-10-13 EP EP11185041.8A patent/EP2442329B1/en active Active
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EP0798752A2 (en) * | 1996-03-26 | 1997-10-01 | Matsushita Electric Works, Ltd. | Sealed contact device with contact gap adjustment capability |
EP1953784A1 (en) * | 2005-11-25 | 2008-08-06 | Matsushita Electric Works, Ltd. | Electromagnetic switching device |
Also Published As
Publication number | Publication date |
---|---|
EP2442329B1 (en) | 2014-07-09 |
ES2505247T3 (en) | 2014-10-09 |
KR101072630B1 (en) | 2011-10-12 |
US20120092102A1 (en) | 2012-04-19 |
US8330565B2 (en) | 2012-12-11 |
JP2012089482A (en) | 2012-05-10 |
JP5296854B2 (en) | 2013-09-25 |
CN102543586B (en) | 2014-10-15 |
CN102543586A (en) | 2012-07-04 |
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